It is entirely different from your cop scenario. Cops actually have a duty to intervene and prevent a crime even if not on duty or in their jurisdiction. Not only do firefighters not have that same duty, they are usually prohibited from doing so by their liability policies.
No it’s not entirely different. No they don’t have a duty to intervene even if not in their jurisdiction. Cops can’t pull over people in other states that are speeding by them? They can’t pull their gun and interfere with a robbery in an official form they do it as a citizen.
They are prohibited? LOLOLOLOL! Keep reaching you are wrong. Oh by the way yes firefighters do take an oath so your weak attempt at saying cops have a duty and firefighters don’t just depends on how important they think their word is. Apparently in this case not very important.